data_global
_chemical_name_mineral 'Eucryptite'
loop_
_publ_author_name
'Pillars W W'
'Peacor D R'
_journal_name_full 'American Mineralogist'
_journal_volume 58
_journal_year 1973
_journal_page_first 681
_journal_page_last 690
_publ_section_title
;
 The crystal structure of beta eucryptite as a function of temperature
 T = 200 C
;
_database_code_amcsd 377
_chemical_formula_sum 'Si Al Li O4'
_cell_length_a 10.499
_cell_length_b 10.499
_cell_length_c 11.197
_cell_angle_alpha 90.0
_cell_angle_beta 90.0
_cell_angle_gamma 120.0
_cell_volume 1068.878
_exptl_crystal_density_diffrn  2.349
_symmetry_space_group_name_H-M 'P 64 2 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,x-y,2/3-z'
  'x-y,x,2/3+z'
  'y,x,1/3-z'
  '-y,x-y,1/3+z'
  '-x+y,y,-z'
  '-x,-y,z'
  '-x,-x+y,2/3-z'
  '-x+y,-x,2/3+z'
  '-y,-x,1/3-z'
  'y,-x+y,1/3+z'
  'x-y,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Si1   0.2499  0.0  0.0  0.00469
Si2   0.2476  0.4952  0.0  0.00697
Al1   0.2532  0.0  0.5  0.00621
Al2   0.2499  0.4998  0.5  0.00811
Li1   0.0  0.0  0.5  0.02153
Li2   0.5  0.0  0.0  0.07726
Li3   0.5  0.0  0.324  0.0228
O1   0.086  0.1947  0.2435  0.01254
O2   0.6038  0.7006  0.2655  0.01026
O3   0.1067  0.7106  0.2572  0.0233
O4   0.5906  0.2017  0.2499  0.01393